The map is Reflectionaly symmetrical (like lumberyard and ravine). The 2 key ideas in mind are:
- Heavy industrial, including lots of pipes, a certain amount of environmental fog.
- Some particle effects of gas escaping from pipes.
Ezekel is also experimenting here somewhat with a more morbid, more dangerous feeling map. He's trying to play to paranoia to make it feel like your not safe - thus he got high roofed areas to give the impression of openness, and isolation. low lighting, with contest to the glowing coals and metals add to the suspense he feels.